This PS introduces a 2 node check in zuul, it uses the KubeADM-AIO
container to stand up a master and worker node, before deploying
OpenStack-Helm using NFS as a PV backend. This check is a stopgap
untill a 3 node gate is deployed which will use ceph and enable
HA of all components to be tested.
Change-Id: I7bb70e6b103a483a0e1df1492fa2047d229eb86f
